The Causes of Noise and Vibration of Hydraulic Oil Pump of Compressed Garbage Truck

Reasons for the noise and vibration of the hydraulic oil pump of a compressed garbage truck：

Once the hydraulic oil pump of the compressed garbage truck fails, it will immediately affect the normal operation of the hydraulic system. Noise is a fault that often occurs in hydraulic oil pumps, but how to detect and eliminate it?

(1) The filter or suction pipe is partially blocked or the passage area is small. What we have to do at this time is to clean the filter element or the suction pipe, and replace the appropriate filter or suction pipe.

(2) The air hole of the fuel tank is blocked. This requires us to clean the vent.

(3) The oil suction position is too high or the oil level of the oil tank is too low. At this time, we have to lower the installation height of the hydraulic pump or add oil to the oil level line.

(4) The hydraulic oil pump or the oil suction pipe is not tightly sealed. At this time, we need to check the tightness of the connection and the joint surface and tighten it.

(5) Inhale air bubbles. This newly installed oil pump is relatively common. We need to run no-load to remove air; the oil suction pipe is separated from the oil return pipe at a certain distance, so that the oil return pipe port is inserted to a certain depth below the oil surface, and the oil return pipe cannot be placed in the oil. Above the surface.

(6) The viscosity of the oil is too high. This requires us to check the oil quality and select the oil viscosity as required.

(7) The suction cavity passage of the hydraulic oil pump is not smooth. At this time, we need to remove the pump and clean it for inspection.

(8) The internal parts of the bearing of the hydraulic oil pump are severely worn. At this time, we need to disassemble the pump for repair or replacement.

(9) The structural design of the hydraulic oil pump is poor and the oil trapped seriously. This can only improve the design and increase the unloading capacity.

(10) The internal parts of the hydraulic oil pump are blocked or damaged, the journal oil seal is damaged, and the oil inlet sealing ring is damaged; the prevention and elimination methods are: clean and replace.

(11) The electromagnet of the electro-hydraulic valve is malfunctioning and the control pressure is unstable; the prevention and elimination method is: overhaul and select the appropriate control oil circuit.

(12) Hydraulic pulsation in the hydraulic pipeline, unreasonable matching of pipe length and component installation positions, blockage of the suction filter, leakage of the suction pipeline, excessive or low oil temperature, loose pipe clamps, etc.; prevention and elimination methods are as follows: : Add an accumulator or muffler at the outlet of the hydraulic oil pump, reasonably determine the pipe length and component installation position, clean or replace, improve the sealing, check the working condition of the temperature control component, and tighten it.

(13) The orifice of the counterflow valve is blocked, the valve seat is damaged, the spring is fatigued or damaged, the valve core is not moved flexibly, the remote pressure regulating pipeline is too long, and the whistling sound is generated; the prevention and elimination methods are: cleaning, repairing, and replacing the spring When cleaning and deburring, the length of the pipeline should be shortened as much as possible when the requirements of use are met.

(14) The hydraulic pump of the mechanical part and the coupling of the prime mover are not concentric or loose, the hydraulic pump is poorly installed, the pump and the motor are poorly coaxial, the base of the prime mover, the hydraulic pump bracket, and the fixing screws are loose, and the mechanical transmission parts (belt , Gear, rack, bearing, rod system) and motor failure; at this time there will be some abnormal noise, we must reinstall the pump to meet the technical requirements. The methods of prevention and elimination are: readjusting, tightening the screws, tightening the screws, repairing or replacing them.